Physical–mechanical and antimicrobial properties of nanocomposite films with pediocin and ZnO nanoparticles

• Published in: Carbohydrate polymers Vol. 94; no. 1; pp. 199 - 208
• Main Authors: Espitia, Paula Judith Perez, Soares, Nilda de Fátima Ferreira, Teófilo, Reinaldo F., Coimbra, Jane Sélia dos Reis, Vitor, Débora M., Batista, Rejane Andrade, Ferreira, Sukarno Olavo, de Andrade, Nélio José, Medeiros, Eber Antonio Alves
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.04.2013; Elsevier
• Subjects: Algorithms; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; anti-infective properties; Applied sciences; Bacteriocins - chemistry; Bacteriocins - pharmacology; Biological and medical sciences; color; Composites; crystal structure; Disk Diffusion Antimicrobial Tests; Exact sciences and technology; Food borne pathogens; Food industries; Food Packaging; Food preservation; Forms of application and semi-finished materials; Fundamental and applied biological sciences. Psychology; General aspects; Handling, storage, packaging, transport; Linear Models; Listeria monocytogenes; Listeria monocytogenes - drug effects; methylcellulose; Methylcellulose - chemistry; microorganisms; microscopy; Nanocomposite films; nanocomposites; Nanocomposites - chemistry; nanoparticles; Nanoparticles - chemistry; Packaging characterization; Particle Size; Pediocin; Polymer industry, paints, wood; response surface methodology; Staphylococcus aureus; Staphylococcus aureus - drug effects; Surface Properties; Technology of polymers; Tensile Strength; thermal stability; Thermogravimetry; X-Ray Diffraction; zinc oxide; Zinc Oxide - chemistry; Zinc Oxide - pharmacology; ZnO nanoparticles; Pediocin; Food borne pathogens; Nanocomposite films; Packaging characterization; Food preservation; Food packaging; ZnO nanoparticles; Biological properties; Mixing; Film; Cellulose(methyl); Response surface methodology; Property formulation relationship; Thermal stability; Zinc oxide; Nanocomposite; Manufacturing; Cellulose ether; Growth from solution; Swelling; Bacteriocin; Color; Mechanical properties; Crystallinity; Experimental study; Bactericidal effect; Morphology; Antibacterial agent; Paper packaging
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2013.01.003

► Nanocomposite films of methyl cellulose were made using central composite design. ► ZnO nanoparticles and pediocin were incorporated in nanocomposite films. ► Antimicrobial activity and physical–mechanical changes were evaluated. ► Antimicrobials affected significantly nanocomposite films properties. ► Nanocomposite films had activity against S. aureus and L. monocytogenes. This work aimed to develop nanocomposite films of methyl cellulose (MC) incorporated with pediocin and zinc oxide nanoparticles (nanoZnO) using the central composite design and response surface methodology. This study evaluated film physical–mechanical properties, including crystallography by X-ray diffraction, mechanical resistance, swelling and color properties, microscopy characterization, thermal stability, as well as antimicrobial activity against Staphylococcus aureus and Listeria monocytogenes. NanoZnO and pediocin affected the crystallinity of MC. Load at break and tensile strength at break did not differ among films. NanoZnO and pediocin significantly affected the elongation at break. Pediocin produced yellowish films, but nano ZnO balanced this effect, resulting in a whitish coloration. Nano ZnO exhibited good intercalation in MC and the addition of pediocin in high concentrations resulted crater-like pits in the film surfaces. Swelling of films diminished significantly compared to control. Higher concentrations of Nano ZnO resulted in enhanced thermal stability. Nanocomposite films presented antimicrobial activity against tested microorganisms.